At web.net/owtoad/q.html there's an interesting (and sometimes humorous) address as Margaret Atwood speaks to the Toronto Council of Teachers of English (1995), sample following:
"Question: What are the disadvantages of being a professional novelist or poet?
I guess the key word here is professional. No disadvantages that I can see. Let's put it this way: if I weren't one, I'd be teaching university English. And I've done that. It was really hard. I took up smoking when I got to the part where I had to mark the papers. I had to do something. I wasn't going to get through it otherwise. ... I coughed a lot at six cigarettes a day, so I figured that smoking and I were not meant for each other and I had better give up teaching."